[Discussion]: How good are you at playing SIF

I've been playing a year and a half. When I started I was really bad (I failed most normal song).

However I managed to FC all the songs in all difficulties right before my first year anniversary and I have been FC'ing all new songs that have been coming out.

I thought that it was normal and that people were able to play the game very well after they practice for a year~ish but lately I found out that some people have been playing for really long time and still have a hard time FC'ing songs, is that normal? Also which songs have you managed to FC?